Tartarus changed the topic of #u-boot to: SOURCE MOVED TO https://source.denx.de/u-boot/u-boot.git / U-Boot v2024.01, v2024.04-rc3 are OUT / Merge Window is CLOSED, next branch is OPEN / Release v2024.04 is scheduled for 02 April 2024 / Channel archives at https://libera.irclog.whitequark.org/u-boot
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<apalos> anyone remembers if we can call unmap_sysmem(NULL); on all platforms?
<apalos> or we should not be calling it on NULL?
<apalos> right i think the only implication would be sandbox with pci enabled (??)
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<mwalle> marex: sorry, didn't see your message, yeah i'm actually one of the maintainers
<mwalle> (and also my employer makes products with winbond flashes)
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<marex> mwalle: pfft
<marex> mwalle: with or without SR3 ?
<mwalle> marex: without ;)
<mwalle> marex: we just protect the bootloader and assert WP#
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<mwalle> marex: back in the days, each time you forgot to deassert WP# during development, u-boot and linux would gladly disable all your locking bits and you'll end up with an unprotected flash
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<mwalle> marex: and during my research, that "unlock all" misfeature was just there because there are flashes where the locking bits are volatile and after power-up are set. But it was implemented for all flashes
<mwalle> *i found out
<mwalle> and it was a PITA to revert that while somehow retaining backwards compatibility. That's why your "just disable the WPS bit" (thinking it was unconditional) triggered me
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<marex> mwalle: good for you
<marex> mwalle: nWP should be hardware protection, right ?
<marex> mwalle: I mean, if nWP is low, then no writes can happen to the SPI NOR or status registers, period, no matter what you do on the SPI bus
<marex> mwalle: I suspect the unlock_all stuff was there to reset protection on SPI NORs which misbehaved, that's why I added this fixup there too
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<mwalle> marex: yeah if WP# is low (and the lock bit in the status register is set IIRC) you cannot execute the WREN command
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